How to allow ONLY image posts?

I would like to restrict users to only image posts. Comments should be allowed still I just don’t want any blog or other media posts. Any suggestions for the best way to accomplish this would be hugely appreciated.

Thanks again I have started to use bp_album+ plugin which is pretty close to adding the functionality I want straight out of the box as it enables image uploads and comments to be posted to users wire. Just got to figure out how to remove upload privacy options now!?!